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Nortel FT1DP - Motorola FT100M Crossover Cable
P-R S-T U-V W-X A-A
9 pins per connector
SG not required if only balanced circuits in use.
Motorola FT100S
DB25F/V.35
DB25 V.35
equiv
Function In/
Out
2 P TDa
14 S TDb
24 U Ext TCa
23 W Ext TCb
3 R RDa
16 T RDb
17 V RCa
19 X RCb
1 A FG -
7 B SG -
9 -- not used -
10 -- not used -
11 -- not used -
12 -- not used -
22 -- not used -
4 C RTS
5 D CTS
6 E DSR
8 F RLSD
13 AA/a TCb
15 Y TCa
18 J LL -
20 H DTR
21 BB/b RL -
25 K Test mode -
Nortel FT1DP
DB25F
In/
Out
DB25 V.35
equiv
Name
3 R RDa
16 T RDb
17 V RCa
9 X RCb
2 P TDa
14 S TDb
24 U Ext TCa
11 W Ext TCb
- 1 A FG
- 7 B SG
- 20 -- -
- 23 -- -
- 5 -- CTSa
- 6 -- DSRa
- 8 -- DCDa
15 Y TCa
4 C RTSa
10 F DCDb
12 AA TCb
13 D CTSb
- 18 -- LL
- 19 -- RTSb
- 21 -- RL
22 E DSRb
- 25 -- Test mode

Pin  RS232 Dir Description
1 GND - Shield Ground
2 TXD O Transmit Data
3 RXD I Recieve Data
4 RTS O Request to Send
5 CTS I Clear to Send
6 DSR I Data Set Ready
7 GND - System Ground
8 CD I Carrier Detect
9 - - RESERVED
10 - - RESERVED
11 - - UNASSIGNED
12 S.CD I Secondary Carrier Detect
13 S.CTS I Secondary Clear to Send
14 S.TXD O Secondary Transmit Data
15 TXC O Transmission Signal Element Timing
16 S.RXD I Secondary Recieve Data
17 RXC I Reciever Signal Element Timing
18 - - UNASSIGNED
19 S.RTS O Secondary Request to Send
20 DTR O Data Terminal Ready
21 SQD I Signal Quality Detector
22 RI I Ring Indicator
23 SS - Data Signal Rate Selector
24 TXC - Transmit Signal Element Timing
25 - - UNASSIGNED

Modified: